what should i keep, shindo or mcintosh

Shindo is quite capable of incredible dynamics and "punch", just not with mismatched speakers. System matching is always critical, especially when using carefully tuned gear like Shindo. If you're hearing the tonal accuracy and a musical sound but not the dynamics- its quite possibly set up (not using the correct Shindo cables, racks etc.) or speaker/amp matching.

"Shindo is getting good reviews but that does not mean success and a long market life."
... Shindo has been in business since 1974 with Shindo Laboratory Inc being formed in 1977. While I can not predict the future, I'd say the track record shows they're not going anywhere. I also believe you have it backwards- the small guys with low overhead are more likely to survive, the big corporate companies will more likely fail should the market "die." However, I do not agree its dying.

BTW- this post died nearly two years ago.